X-ray tube.



I. S. HIRSOH.

X-HAY TUBE.

APPLICATION FILED MAY15, 1913.

1; 1 20,493., Patented Dec; 8, 1914.

ISAAC SETH HIRSCH, OF NEW YORK, N. Y.

X-RAY TUBE.

Application filed May 15, 1913,

To all whom it may concern Beit known that I, ISAAC SETH I-IIRscH, a citizen .of the United States, residing at New York, in the county of New York and State of New York, have invented certain new. and useful Improvements in X:Ray Tubes, of which the following is a specification.

This invention relates to X-raydevices particularly to a novel form of X-ray tube I and has for its object the provision of a tube having double walls to provide an annular space for containing oil or solutions of various salts for the two-fold purpose of absorbing the heat generated and filtering the rays. j

A further object is toprovide a tubeof this character provided with means for receiving detachable caps of various materials for further filtering the rays and also to serve as a fillingorifice.

There are two parts in an X-ray tube where heat is generated, the negative pole or cathode cup from which the cathode stream rushes to the target orpositive pole, and at the point where this cathode stream strikes-the anode or target of the tube. This heat is carried ofi by both the glass of the tube and the metal parts and the slow radiation of this heat is the cause of the lowering of the vacuum in the tube which results in the generation of X rays of low penetrating power called soft rays, which have a destructive effect on the superficialhuman structure. By placing in said annular space between the double walls of my device aninsulating substance of heat absorbing qualities I absorb the heat generated by the impact of the cathode stream against the anodal target and reflected against the inner wall of the'tube and alsocool the in which like numerals are employed to.

cathode of the tube, and further by the provisionof detachable caps of various materials I .provide means for filling said an nular space and for the further absorption and filtration of any soft rays that may be designate corresponding parts throughout the several'views Figure 1 is a longitudinal sectional view through one form of the tube,

Fig. 2 is a parts'ioeing' in elevation, and similar view through a modified form.

Specification of Letters Patent.

' Patented Dec. a, rare.

Serial NO- 767,879.

Referring more particularly to the draw ings, the numeral 1 designates the bulb of an X-ray tube which is provided with the usual cathode 2, anode 3, and regulating chamber or device 4 which may be of any [sort desired.

Surrounding the bulb 1 and spaced therefrom is a shell or container 5 of glasswhich has one end 6 connected with the anode tube closure 10 is formed on the shell or container 5' for filling the space between. the

bulb 1v and the shell or container 5 with;

any desired fluid 11.

In Fig. 2 a modified form of the is shown. 'In this instance the tube 9 is dispensed with and the shell or container 5 device is provided upon itslower side with an opening 12 and an annular-flange 13 which is preferably externally screw-threaded for the reception of a cap 14 of aluminum or lether desired metal or glass of different inds.

'- By this construction it will beapparent ingthe process ofradiography. Further-,,

more, the objectionable rays emanating from the tube will be absorbedby-any suitable fiuid or solutionsurrounding the bulb 1. v

In the structure shown in Fig. 2 the cap 14 may be used for filling the spacehbetween the bulb l and shell or container. 5. Furthermore, certain additional objectionablerays may be taken up by the material of the cap which may be formed of any desired thickness of aluminum, silver, 'iron, glass or any other material desired. In bothforms the cooling eflect of the surrounding fluid on the entire tube is marked.

Having thus described my invention what I claim is:

maintaining said fluid around said bulb.

2. In combination with an X-ray bulb containing a cathode and an anode, a cooling and filtering material surroundin said bulb, and means for maintaining sa1 materm] in an operative posltion.

3. In combination with an X-raylbulb containing a cathode and an anode, a cooling and filtering material surrounding said bulb, and means for maintaining said material in an operative position; said means "comprising a container for said material and spaced apart from said bulb.

4. In combination with an X-ray bulb I containingv a cathode and an anode, a coolmg and filterlng material surrounding sald bulb, and means for maintaining said materialin an operative position; said means vided with a cathode-and anvanode, a closed shel spaced from and surrounding said comprising a container for said material and spaced apart from said bulb and. closed at one end by the cathode and at the other end by the anode, a 3 .l

'5. An X-ray tube comprising a bulb probulb, and a cooling and filtering fluid'in said shell;. one end of said shell-surrounding and closed by. said cathode .and the other end surrounding and closed by said anode.

v 6. -An X-ra'y tube comprising a bulb provided with a cathode and an anode, a shell.

spaced from and surrounding said bulb and {adapted to contain fluid for cooling said cathode and said bulb; said shell being substantially oval in shape and closed at the ends by having one end encircle the cathode and the other end encircle the anode.

7. An X-ray tube'comprising'a bulb provided with an anode and a cathode, a shell spaced from and surrounding said bulb and adapted to contain fluid, and means for fill-' ing'the" space between said bulb and said shell, said means comprising a removable cap connected with said shell, said cap also serving as a filter.

8. An X-ray'tube comprising a bulb'provide'd with an anode and acathode, a shell spaced from and surrounding said bulb and adapted to contain fluid, and means for filling the space between said bulb and saidshell, said means comprising a removable capsecured upon a flange formed on said container surrounding and closed by. the.

shell, said cap also serving as a filter.

9. An X-ray tube comprising a bulb provided with an anode and. a cathode, a shell spaced'fr'om'and surrounding'said bulb and adapted to contain fluid, and means for fill-.

ing the'space' between said bulb and said shell, said means comprising a removable cap screw-threaded upon a flange formed on said shell, said cap also serving as a ray 10. In combination with an X-raytube comprising a bulb, a cathode and an anode, a fluid container surrounding said bulb and a cathode cooling in said container.

T 11. In an X-ray tube having a bulb, a cathode tube and an anode tube, a fluid container surrounding said bulb, one endof said cathode and a cathode tube, an anode and an anode tube, and a shell surrounding and spaced from said bulb and having?one'end connected with and closed by said cathode;

and X-ray filtering fluid cathode tube and the otherendsurroundin andiclosedby the'anode tube, and a cathode 1 Y cooling and X-ray filtering fluid, in-said 4 removing saidf'fluid.

13. An X-ray tube comprising a bulb, acathode, an anode, a shell surroundingsaid, bulb, and a cap in said shell; saidcap bemg adaptedfto. absorb deleterious-or; objectionable rays oflowpenetrating power. 1.

14. .An X-ray tube comprising a bulb? provided with a cathode and an anode, ;a shell surrounding saidbulb, and a removablecap; said cap. being adapted to permit of-access soft rays generated in said tube. I

( to the interior of said shell and tojjabsorb 15. An X-ray tube'comprising-abullha cathode, a. cathode tube, an anode,:an anode tube, and a shell surrounding and spaced from said bulb and having oneend, closed by and connected'with said-cathode tube and the other end closed by and connected @with .95 said anode'tube.

' 1 6.-An X-ray tubecomprising a,

cathode tubefa cathode, an anode. tube,";an, I

anode, a shell surrounding and spaced apart from said bulb andhaving one end. closed- 0 by and connected with said cathode tube and. the other-end closed by and connected. with said anode tube, and a cooling andFfilberin g r connected with and closed by said cathode tube and the other end connectedwithand '11ju closed by said anode tube, and a cooling shell.

l8. AnX-ray tube comprising ,9; bulb, a.

tube and the other end connected with and closed by said anode tube, and a removable window in said shell.

19. An X-ray tube comprisinga bulb pro- 'vided with an anode and a cathode, a shell spaced from andsurrounding said bulb and adapted to contain fluid for cooling said; cathode and said bulb one end of said shell encircling'and beingjclosed by the anode and the other end encircling and being closedby v the cathode.

20. In an'X-ray tube having a bulb,"a,=130

, 7d cathode tube. and an anode tuba-a fluid conthe space betweenqsaid' bulb material intermediate ofsaid'bulb-andshell. i I -;ray tube comprising. a bulb, a; cathode and a cathode tube, an anode andnn anode tube, and a shell surrounding and spaced from said bulb and having-oneend- 1 cathode tube and an anode tube, a fluid conrounding and closed by the anode tube, ,a

cathode cooling and X-ray filtering fluid in said container, and a removable cap in said container, said cap also serving as a filter.

21(In an X-ra-y tube having a bulb, a-

cathode tube and an anode tube, a fluid container surrounding said bulb, one end of said container surrounding and closed by the cathode tube and the other end surrounding and closed by the anode tube, and means Within said container for cooling the bulb and the. cathode and preventing the production of soft rays.

. 22. In mfx i a efiube nav iag at-bulb, a cathode tube and an" anode tube, a fluid container surrounding said bulb, one end of said' contai'ner' surrounding and closed bythe cathode tube and the other end surrounding and-closed by the "anode tube, and means between said container and said bulb for cooling the bulband the cathode and maintaining a maximum vacuum in said bulb to prevent the production of soft rays.

In testimony whereof I hereto aflix my signature in the presence of two Witnesses.

. ISAAC SETH HIRS CH.

- Vitnesses':

MARK L. FLEMING, FRANK ERDWURN. 

